/Engine/Source/Runtime/SlateCore/Public/Application/SlateApplicationBase.h
Checks whether the specified widget has any descendants which are currently focused for the specified user user.
true if any descendants are focused, false otherwise.
bool HasUserFocusedDescendants ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & Widget, int32 UserIndex ) const